These Felt Wheels Come In A Package Of 8 Pieces And Are Mounted On 1/8" Shanks. They Are Excellent For Polishing And Are Compatible With Most Rotary Tools. Each Felt Wheel Is 7/8" In Diameter And They Are Great For Putting The Finishing Touches On Your Work.* Package Of 8 Pieces * 7/8" In Diameter * Pre-Mounted * Shank Is 1/8" * Superior Quality